Radiological risk assessment of outdoor 222 Rn and 220 Rn around rare earth element and uranium mines from northern Vietnam

The outdoor Rn and Rn concentrations at 320 sampling points at 1 m above the ground in different sites surrounding rare earth element (REE) and uranium mines from northern Vietnam were measured using the RAD7. Results showed that Rn concentrations were always higher than Rn concentrations with large...

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Bibliographic Details
Published inJournal of radiological protection Vol. 43; no. 2; p. 21511
Main Authors Hoang, Van-Hiep, Tai Tue, Nguyen, Nguyen, Thai-Son, Dang Quy, Tran, Nguyen, Thanh-Duong, Nguyen, Van-Dung
Format Journal Article
LanguageEnglish
Published England 08.06.2023
Subjects
Mining
Radiation Monitoring
Radon - analysis
Risk Assessment
Uranium - analysis
Vietnam
Vietnam
northern Vietnam
220Rn and 222Rn
natural radionuclides
REE mines
uranium mines
radiological hazard
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Summary:The outdoor Rn and Rn concentrations at 320 sampling points at 1 m above the ground in different sites surrounding rare earth element (REE) and uranium mines from northern Vietnam were measured using the RAD7. Results showed that Rn concentrations were always higher than Rn concentrations with large variation ranges from 25.7 to 573 Bq m and from 18.5 to 385 Bq m , respectively. The high correlation between Rn and Ra concentrations in surface soil of the studied sites were observed. The highest Rn and Rn concentrations are found at the sampling points of the REE NX-Lai Chau site. The Rn and Rn activities surrounding the REE mines were found to be higher than those surrounding the uranium mines. The average annual committed effective doses originated from the inhalation of Rn and Rn outdoor concentrations is about five times higher than the worldwide average value.
ISSN:0952-4746
1361-6498
DOI:10.1088/1361-6498/acda43